Patents by Inventor James Thomas Will

James Thomas Will has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 2,9-dichloro-quinacridone as ?-quinacridone crystal phase inhibitor
    Patent number: 7419542
    Abstract: The invention is directed to a method or use of 2,9-dichloro-quinacridone as an alpha crystal phase inhibitor and optionally, 4,11-dichloroquinacridone during the beta-quinacridone or gamma-quinacridone crude pigment particle size reduction processes. The invention is also directed to solid solutions of quinacridone comprising about 98 to about 80 weight % gamma or beta-quinacridone, about 0.1 to about 10 weight % 2,9-dichloroquinacridone and about 0.1 to about 10 weight % 4,11-dichloroquinacridone.
    Type: Grant
    Filed: July 18, 2006
    Date of Patent: September 2, 2008
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Yingxia He, Colin Dennis Campbell, Gordian Schilling, Rhonda Carter, Melissa Wagner, James Thomas Will, Kevin Rodney Gerzevske